With respect to both "nitroplanes" and "xheli", do not buy from them.  I purchased a erazor 450 rtf  heli from them.  I like the bird but have never experienced such terrible service from tech support or customer service.  I have been hung up on twice over the performance of an included li-po charger(a 650 mili amp decrease in output current based on actual charge time). They said the unit is with in their standards.  The promise a 1 amp charge rate and deliver a 350 mili amp rate.  The chopper needed a lot of work to get it in the air and with their support of what they sell I must advise anyone reading to stay away from these companies.